[jffry]

They're callable as functions, i.e. they implement clojure.lang.IFn. So unless you want to shave hairs on what it means to say they're not "functions", they _are_ functions. Sets, vecs, maps, keywords, and IIRC symbols are all IFn

Oh and (#{1 2} 3) is equivalent to (get #{1 2} 3) not (contains? #{1 2} 3)

[stingraycharles]

I think that it depends upon what you interpret it when you say “it’s a function”; it’s data as well. Which, now that I reconsider it, was kind of the point that the parent was trying to make, that they’re also very much unified.

So point taken.